LM3561TMX National Semiconductor Corporation, LM3561TMX Datasheet - Page 23

• Manufacturer Part Number: LM3561TMX
• Description: Synchronous Boost Converter With 600ma High Side Led Driver And I2c-compatible Interface
• Manufacturer: National Semiconductor Corporation

Register Descriptions
ENABLE REGISTER (ADDRESS 0x10)
The Enable Register contains the enable bits that turn on the device in Indicate Mode, Torch Mode, or Flash Mode (bits[1:0]).
These bits are always reset at the end of a flash pulse. Bit [2] sets the STROBE level or edge control.
INDICATOR BRIGHTNESS REGISTER (ADDRESS 0x12)
The Indicator Register contains the bits to set the indicator current level in indicate mode.
N/A
Bits [7:3]
Not Used
N/A
Indicator Brightness Register
Torch Brightness Register
Flash Brightness Register
Configuration Register 1
Configuration Register 2
Flash Duration Register
Not Used
Bits[7:3]
VIN Monitor Register
Enable Register
Register Name
GPIO Register
Flags Register
0 = STROBE Input set for Level. Flash current
turns on when STROBE input is high and turns
off when STROBE either goes low or the
Timeout Duration expires (default)
1 = STROBE Input set for edge triggered. Flash
current turns on when STROBE sees a rising
edge. Flash pulse turns off when timeout
duration expires
TABLE 3. Indicator Brightness Register Bit Settings
(Strobe Level or Edge, STR bit)
TABLE 2. Enable Register Bit Settings
TABLE 1. LM3561 Internal Registers
Bit 2
Internal Hex Address
0xA0
0xB0
0xC0
0xD0
0xE0
0x10
0x12
0x20
0x80
0xF0
23
Bits [2:0]
Indicate Current Settings
000 = 2.25mA (default)
001 = 4.5mA
010 = 6.75mA
011 = 9mA
100 = 11.25mA
101 = 13.5mA
110 = 15.75mA
111 = 18mA
Enable Bits
00 = Shutdown (default)
01 = Indicator Mode
10 = Torch Mode
11 = Flash Mode (bits reset at timeout)
Power On or Reset Value
Enable Bits
Bits [1:0]
0xFD
0xFA
0xEF
0x6A
0xF8
0xF8
0x80
0xF8
0x00
0xF0
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